LegalLookout: EPA Proposes Tighter PM Standards

EPA has been busy addressing particulate matter (PM), a mixture of very fine particles
and/or liquid droplets to which exposure is, according to the agency, directly linked to
health problems.

Proposed NAAQS standard

In January, EPA proposed revisions to the primary and secondary national ambient air
quality standards (NAAQS) for PM. The proposed revisions address both fine particles of 2.5
micrometers in diameter and smaller (PM2.5); and inhalable, course particles that are
smaller than 10 micrometers in diameter, but larger than PM2.5 (PM10-2.5). The proposal
addresses two types of standards: primary standards, intended to protect public health, and
secondary standards, intended to protect public welfare, such as crops, vegetation, wildlife,
buildings and national monuments, and visibility. According to EPA, studies have found an
association between exposure to PM and health problems including asthma, chronic
bronchitis, reduced lung function, heart attack, and premature death in people with heart or lung disease.

EPA is proposing revisions to many aspects of the PM NAAQS. The proposal includes
lowering the level of the 24-hour fine particulate standard from 65 micrograms per cubic
meter (μg/m3) to 35 μg/m3, retaining the level of the annual fine standard at 15 μg/m3, and
setting a new 24-hour standard for inhalable course particles at 70 μg/m3.
The proposal sets a general timeline for implementing the standards. If EPA issues, in final,
the new standards in September 2006, as required by court order, states would make
recommendations by November 2007 for areas to be designated attainment and nonattainment. EPA would make the final designations for PM2.5 by November 2009, and
those designations would become effective in April 2010. States would have until April 2013
to submit state implementation plans (SIP) outlining how states will reduce pollution to
meet the standards. States would have until April 2015 to meet the standards. For PM10-
2.5, final designations would not be made until May 2013, and the designations would
become effective in July 2013. States would have to meet the standards by July 2018. In
some cases, a state could receive additional time to meet the standard, up to July 2023.

Implementation issues ANPR

On Feb. 3, 2006, EPA issued an advance notice of proposed rulemaking (ANPR) for
implementation of the NAAQS for PM. By engaging stakeholders early in the process, EPA
hopes to be in a position to address the many cost implications associated with meeting
more stringent PM standards. It is not only industry that is concerned about these new
standards, states are equally under the gun to develop implementation plans and prepare to
demonstrate attainment in as many areas as possible.

EPA is being very solicitous of input on many issues associated with the implementation of
revised PM standards. It highlights and provides EPA’s preliminary thinking on how to
address some of the key New Source Review issues related to the PM course standard and
the transition from a PM10 to a PM course standard.

EPA’s efforts to identify issues early in the process, and to solicit input at the very beginning
of the process is commendable. Business interests are urged to engage early, regularly, and
effectively in the opportunities presented by the proposed rule and the ANPR. That is the
good news. The bad news is because EPA is being so careful and solicitous about how best
to go about crafting and implementing the new PM standards, failure to engage now will be
very prejudicial to any interest wishing to challenge any file rule down the road. It will be
very difficult to argue EPA failed to provide adequate opportunity to comment on issues of
critical important given the advance work that is now in play.

Lynn L. Bergeson is a founding shareholder of Bergeson & Campbell, P.C., a
Washington D.C. law firm concentrating on chemical, medical device, and diagnostic product
approval and regulation, and associated business issues.

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